How do I pan in Blender using a Wacom 3D Pen?
You just have to emulate a 3 button mouse. Here's how to do it:


Go to the User Preferences.
Go to the Input tab.
Check Emulate 3 button mouse.
Hit Save User Settings.


From here on out you can rotate the view using Alt + click and dragging, zoom using Alt+Ctrl + click and finally navigate using Ctrl+Shift + click.